Guangzhou Changfeng Steel Co., LTD
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Pre-hardened 1.2738 P20+Ni Plastic Mould Steel Plate
Pre-hardened large size injection mould, can be pollished normally, used for making high demand large plastic mould.
1, Grade
| GB | AISI | DIN |
| 3Cr2MoNi | P20+Ni | 1.2738 |
2, Chemical composition(%)
| C | Si | Mn | P | S | Ni | Cr | Mo |
| 0.30-0.50 | 0.20-0.50 | 1.00-1.50 | ≤0.010 | ≤0.030 | 0.80-1.20 | 1.50-2.00 | 0.25-0.40 |
3, Available size(mm)
| Flat Bar Size(mm) | Round bar Size(mm) | |||
| Thickness | Width | Length | Diameter | Length |
| 10-1100 | 155-2200 | 2000-6000 | 20-200 | 2000-6000 |
4, Recommend heat treatment
| Quenching | Tempering | ||||||
| Heating temperature/ºC | Cooling way | Hardness (HRC) | Tempering temperature /ºC | Tempering number | Hardness (HRC) | ||
| First preheating | Second preheating | Last heating | |||||
| 1180-1200 | 1130-1150 | ≥850 | oil Cooling | 50-52 | 200 | 2 | ≥48 |
5, Hardness: 33-37HRC
6, The process flow
1) Hot rolled or forged condition, Pre-harden &tempering , black surface
2) Hardness: 30~36HRC
3) Hot rolled technology:EAF+LF+VD
4) Forged technology: EAF+LF+VD+ESR+Forging +Q T + Machined surface
7, Features
A, Good Polishing performance, abrasion resistance and high tensile strength
B, No quenching crack danger, Without heat treatment costs that can reduce the tool cost..
8, Application
Suitable for large-scale plastic injection products,such as home appliance, computer case, telephone sets, audio PMMA products.Used for manufacturing hot-extrusion die and mandril by aluminium alloy sections,swage hammers, forging presses, forging machine, high modulus die under high temperature and shock loading
9, Packing: Standard export packing or according to customers' request.
10, Delivery:
For abundant stock, 15-20 days.
For customized products, 30-50 days.
11,Products picture
Corner of the factory